Thomas j



(No Model.)

T. J. BELL & N. A. GRIFFITH.

FURNAGB P oR DBSULPHURIZING AND G HLORIDIZING oREs. No. 245,991.

Patented Aug. 23, 1881.

Marly-constructed pulp-vat.

UNITED STATES PATENT OEEICE.

THOMAS J. BELL AND NATHANIEL A. GRIFFITH, OF GRANTVILLE, NEV.

FURNACE FOR DESULPHURIZING AND CHLORIDIZING CRES.

SPECIFICATION forming part of Letters Patent No. 245,991, dated August 23, 1881.

Application filed November 8, 1880.

To all whom t may concern.-

Be it known that we, THOMAS J. BELL and NATI-IANIEL A. GRIFFITH, ofGrantville, connty of Nye, and State of Nevada, have invented a Desulphurizing and Ghloridizing Furnace and Pulp-Vat; and we herebypdeclare the following to be a full, clear, and eXact description thereof.

Our invention relates to a furnace for desulphurizing and chloridizing ores, and in connection therewith it further relates to a pecu- The object of our invention is to provide a furnace in which the ore will be gradually roasted, being made to travel toward the heat.

Referring to the accompanying drawings, Figure 1 shows a sectional view of our device. Fig. 2 shows end View of side. Figs. 3 and 4L show details of construction.

Masonry will cover the whole furnace.

Ais the upper furnace, cylindricalin shape, and provided with apertures in its bottom Z and Y at each end, through which project the rollers B. Within the furnace A are the longitudinal ribs D, terminating at their ends in broad rings or bands T, which rest upon the rollers B, and revolve thereon within the furnace A by means of the pulley X, as shown, said pulley being connected with any drivingpower. The opening C near the smoke-stack receives the ore. The furnace A is inclined downwardly toward thev rear. The arms or longitudinal ribs D are made with anges d, to better stir and pick up the ores.

E is a chute at the rear bottom part of the furnace A.

F is the lower furnace, cylindrical in shape, having an opening, as shown, communicating with the chute E above. At its front end are journaled the rollers Gr, and others may be placed at the rear end. Upon these rollers, and within the furnace F, revolve by means of the pulley W the hollow longitudinal ribs I, said ribs terminating at their rear ends in a watertight-cylinder, H, and at their forward ends in the water-tight cylinder J, the spaces within said ribs and cylinders being in open relation with each other, as now explained. The cylinder J is properly a band or ring, through the center of which the fire is admitted. The cylinder H is divided into two parts (No model.)

or longitudinal sections, h and t/ the outer and inner parts, respectively. Half of the hollow ribs I open into the inner division, It', and half into the outer division, 7L. All the ribs open into the cylinder J. An induction-pipe, K, opens into the inner division, 71,', of the cylinder H, and an exit-pipe, L, proceeds from the outer division, h, and around the entrancepipe, bein g separated therefrom by water-tight packing. This exit-pipe opens into a pipe, E', through a-n appropriate water-tight boxing, F. The pipe E is carried outside of the lower furnace, and finally within, where it opens into the pulp-vat M. Gold water is intended to be forced through these hollow arms and pipes. The course ofthe water will be as follows: It enters the pipe K, which, being higher than the exit, will permit its flow. It proceeds through the packed joint into theinner division, 7L', of

the cylinder H, and through two ofthe ribs I to the forward cylinder, J, from whence itflows `back through the exit-pipe L into the pulpvat M. The purpose of this water is to keep the arms or ribs from warping, and at the same time it furnishes hot water for the pulp in the vat M.

N represents the fire-box in front of the forward open end of the lower furnace, F, the lire from which box N is directed within said furnace. The furnace F is slightly inclined forward toward the tire-box N, being in a direction opposite to the inclination of upper furnace, A. The ribs I are flanged similarly to the ribs D in the upper furnace, and for a like purpose.

In the vat M are the revolving horizontal arms I?, operated by the mechanism of pulleys shown. A discharge-pipe, It, carries the pulp to the charge-pans.

The operation of the furnace will be as follows: The ore is fed to the upper furnace, A,`

being all the time carried forward, because ot' roo the stirring and the inclination of the furnace F. The fire from the fire-box Nis directed into the forward end of the furnace F and acts upon the pulp therein, the heat proceeding to its rear end and up through the chute E to the upper furnace, A, and forward out through the smoke-stack in a direction opposite to the progress of the pulp. In this Way the ore in thc upper furnace is gradually and slowly roasted, bein gsubj ccted to greater heat as it approaches the re. At the proper time and in the usual manner lthe chlorine will take effect to the best advantage upon the highly-heated ore.

O is an opening in the forward end of the lower furnace, F, through which the pulp drops into the Vat M, in which it is stirred by the arms I? and kept in constantragitation to pre. vent sand from settling.

We disclaim any novelty in the process of slowly roasting ore by causingitto pass th rough successive cylinders toward the tire. We disclaim,further, any novelty in the inclination of said cylinders operating to this end; also in the use of stirrers.

What we, do claim as new, and desire to secure by LettersPatent, is-

1. In a desulphurizing and chloridizin g furnace, the oppositelyinclined cylinders A and F, in open relation with each other, provided with revolvinglongitudinal flanged ribs D and I, the latter of which is made hollow to pro- Yvide for the circulation of iluid thereto, in the manner and for the purpose set forth.

2. In a desulphurizing and chloridizing furnace having a cylinder, F, the hollow flanged vat M, having horizontal stirrers P, substan-V tially as and for the purpose herein described. In witness `whereof we have hereunto set our hands.

THOMAS J. BELL. Y NATHANIEL A. GRIFFITH. Witnesses:

A. B. HARVEY, E. A. HARVEY. 

